The second girl’s legs are actually pointing toward the left, one leg is behind Girl #1, and the other leg is on top of Girl #1. This still doesn’t show where Girl #2’s second leg is, but it’s a start. Notice that ankle showing between the shoe and jeans on the yellow leg? Even if that is one of the missing legs, whatever is happening with Girl #2’s body is very strange.
Still feeling kind of unclear...here's a third pic:
I'm thinking the most plausible explanation at this point is that yes, girl #3 has no legs on her person. That's gotta be it.